| pref | Configuration File |
| prefs | Configuration File |
| prf | Xilinx CORE Generator Preferences |
| prfpset | Adobe Premiere Pro Effect Preset |
| product | Eclipse IDE Product Settings |
| profile | Bash Shell Profile |
| propdesc | Windows Search Property Description |
| prst | Adobe InDesign Print Settings |
| prx | Windows Media Encoder Settings |
| psproj | PostSharp Project Configuration |
| pssc | Windows PowerShell Session Configuration |
| pvs | Parallels Desktop Configuration File |
| pvx | ParaView XML Configuration |
| pw5 | PlanetPress Workflow Configuration |
| pw6 | PlanetPress Workflow Configuration |
| pw7 | PlanetPress Workflow Configuration |
| q1 | WinAMP Equalizer Presets |
| q2 | WinAMP Equalizer Auto-load Presets |
| q5q | SuperBladePro Presets Data |
| q9q | SuperBladePro Presets Data |
| q9s | Mr Contrast Preset Data |
| qdr | Q-Dir Configuration |
| qemu | QEMU Configuration Data |
| qnc | Cliq Accessories Notepad Customization |
| qop | Autodesk 3D Studio MAX Quad Options |
| qsf | Altera Quartus II Settings File |
| qtes | QuickTime Export Settings |
| qwc | QuickBooks Web Connector Configuration |
| qyp | Quantec Yardstick Presets |
| r1w | Reflection UNIX and OpenVMS Settings |
| r2w | Reflection UNIX and OpenVMS Settings |
| r4w | Reflection UNIX and OpenVMS Settings |
| raskinplace | Raskin Place Layout |
| rb4 | RobotWorks Parameters File |
| rc | Runtime Configuration File |
